Amazon.com: GHK Cu Copper Peptide Powder 99.7%+ Pure Cosmetic Grade Ingredient for DIY Serums, Creams & Scalp Tonics Supports Collagen & Fuller Hair (1g) : Beauty & Personal Care Repair & Rejuvenate Serum Duo SumaNurica A GHK Cu face serum appears blue because the active ingredient, GHK Cu (copper peptide), is naturally a blue colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue lets mix some more ghku copper peptides using @Cristina with no H DIY method. #bluecopperpeptide #copperpeptides #skintok #skinfulsix #skincareproducts The peptide blend drama explained, Does mixing GHK Cu + TB 500 + BPC 157 actually cause degradation?, I checked the science. #peptides #biohacking #science #peptideresearch #sciencetok #biohacking